tetra-

a combining form meaning “four,” used in the formation of compound words: tetrabranchiate.
Also especially before a vowel, tetr-.

Origin of tetra-

< Greek, combining form of téttara, neuter of téttares four

Words nearby tetra-

tethys, teton, teton range, tetr-, tetra, tetra-, tetrabasic, tetrabrach, tetrabranchiate, tetrabromofluorescein, tetracaine

British Dictionary definitions for tetra-

tetra-

before a vowel tetr-

combining form

four tetrameter

Word Origin for tetra-

from Greek

Medical definitions for tetra-

tetra-

pref.

Four:tetradactyl.
Composed of or containing four atoms, molecules, or groups:tetrasaccharide.